Comparison

KB vs Mozaic Plugin Workshop

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KB

This app offers a suite of expressive virtual keyboards and controllers for creating music. It supports playing multiple instruments simultaneously with advanced features like MIDI Polyphonic Expression, scales, and chords. Explore various layouts and expression controls for a versatile musical experience.

Highlights
  • 8 distinct Keyboard Layouts
  • MIDI Polyphonic Expression (MPE)
  • Scales and Chords
  • Powerful Arpeggiator
  • Standalone and AUv3 MIDI Plugin
  • Multiple Octaves and Rows per Keyboard
Features
Currently charting
Read full description

KB-1 MIDI Keyboard KB-1 is a suite of expressive virtual keyboards and controllers designed for a multitude of scenarios. Play multiple instruments simultaneously, complete with MIDI Polyphonic Expression, scales, chords, strumming and more. Overview: - 8 distinct Keyboard Layouts - Multiple Rows per Keyboard - Multiple Octaves per Keyboard Row - 15+ Scales (for layouts that support scales) - MIDI Polyphonic Expression (MPE) - Powerful Arpeggiator - Standalone operation with multiple Keyboards and dedicated MIDI outputs per Keyboard - AUv3 MIDI Plugin Layouts: - Classic (Piano Keys + Wheels) - Uniform (Seboard-style Keys and Layout) - String (String-style Keys) - Scale (Uniform layout with scale support) - Chord (One key per chord for all scale degrees) - Drum (up to 16 user mappable drum pads) - XY (up to 2 configurable XY-Pads) - CC (up to 16 user mappable knobs for CC control) Expression: - Glide (horizontal) - Slide (vertical) - Velocity (mapped to y-axis) - Pressure (iPhone only) App Connectivity: - Standalone - AUv3 MIDI Instrument MIDI Connectivity: - Inter-App MIDI - USB MIDI - BLE MIDI - Network MIDI

About

Mozaic Plugin Workshop

Design and build your own custom MIDI plugins for music production. This tool offers a simple yet powerful scripting language and pre-built components to create filters, sequencers, and generative music tools. It integrates with AUv3 MIDI hosts for seamless workflow.

Highlights
  • Custom MIDI plugin creation
  • Easy-to-learn scripting language
  • Generative music tools
  • MIDI filters and sequencers
  • AUv3 support
  • Tilt sensor integration
  • Built-in script editor
Features
Currently charting
Read full description

Create your own MIDI plugins: MIDI filters, generative music tools, basic sequencers, MIDI control panels, chaos experiments... Let your imagination take you places. Mozaic runs inside your favorite AU MIDI host, and gives you practical building blocks such as LFOs, pre-fab GUI layouts, musical scales, AUv3 support (with AU Parameters, transport events, tempo syncing, etc.), random generators and a super-simple yet powerful script language. Mozaic even offers quick access to your device’s Tilt Sensors for expressive interaction concepts! The Mozaic Script language is designed from the ground up to be the easiest and most flexible MIDI language on iOS. A language by creatives, for creatives. You’ll only need to write a few lines of script to achieve impressive things - or to create that uber-specific thing that was missing from your MIDI setup. Check out the Programming Manual on Ruismaker.com to learn about the script language and to get inspiration for awesome scripts of your own. Mozaic comes with a sizable collection of tutorials and pre-made scripts which you can use out of the box, or which can be a starting point for your own plugin adventures. Features in a nutshell: - Easy to learn Mozaic Script language: easy to learn, easy to read - Sample-accurate-everything: the tightest MIDI timing possible - Built-in script editor with code-completion, syntax hints, etc. - 5 immediately usable GUI layouts, with knobs, sliders, pads, etc. - In-depth, helpful programming manual available on Ruismaker.com - Easy access to LFOs, scales, MIDI I/O, AU parameters, timers - Supports Sysex, with built-in checksum calculations - AUv3; so you'll get multi-instance, state-saving, tempo sync and resource efficiency out of the box Mozaic opens up the world of creative MIDI plugins to anyone willing to put in a few hours and a hot beverage or two. Practical notes: - Mozaic requires a plugin host with support for AUv3 MIDI plugins (AUM, ApeMatrix, Cubasis, Auria, Audiobus 3, etc.) - The standalone mode of Mozaic lets you edit, test and export projects, but for MIDI connections you need to run it inside an AUv3 MIDI host - MIDI is not sound; Mozaic on its own does not make noise... so bring your own synths, drum machines and other instruments! - AUv3 MIDI requires iOS11 or higher

Screenshots

KB4 screens
Mozaic Plugin Workshop4 screens

Verdict

The call

The clearest difference is price: Mozaic Plugin Workshop at $1.99 against KB's $14.99. Mozaic Plugin Workshop also leads on review sentiment (95% vs 79%) and rating (5.0 vs 4.8). KB's advantage is ratings volume (270 vs 81). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

KB costs $14.99 and Mozaic Plugin Workshop $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Mozaic Plugin Workshop holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 270 and 81 respectively. Written reviews point the same way: 79% of KB's written reviews are positive against 95% of Mozaic Plugin Workshop's.

UpkeepUpdate frequency

KB ships an update every 4 months, Mozaic Plugin Workshop every 3 months. The most recent releases landed on September 17, 2026 and September 19, 2026 respectively.

Scorecard4 real differences · 7 level
KB versus Mozaic Plugin Workshop: the parameters behind the verdict, then further details
ParameterKBMozaic Plugin Workshop
Price$14.99$1.99 — better
Rating4.8 (270 ratings)5.0 (81 ratings) — better
Positive reviews79.2% of reviews94.6% of reviews — better
Number of ratings270 — better81
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#199#182 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better12.4
Further details — not scored
Size38 MB3 MB
Age rating4+4+
DeveloperKai ArasBram Bos

Customer experience

KB

All ratings270 ratings
Positive95.2%
Neutral1.1%
Negative3.7%
Written reviews72 reviews
Positive79.2%
Neutral4.2%
Negative16.7%

Mozaic Plugin Workshop

All ratings81 ratings
Positive98.8%
Neutral1.2%
Negative0.0%
Written reviews37 reviews
Positive94.6%
Neutral2.7%
Negative2.7%

In-app purchases

None

KB

No in-app purchases

None

Mozaic Plugin Workshop

No in-app purchases

Questions

Is KB free?
KB costs $14.99, with no in-app purchases.
Is Mozaic Plugin Workshop free?
Mozaic Plugin Workshop costs $1.99, with no in-app purchases.
Which has better reviews, KB or Mozaic Plugin Workshop?
Mozaic Plugin Workshop is rated higher. KB averages 4.8 out of 5 from 270 ratings, while Mozaic Plugin Workshop averages 5.0 from 81 ratings.
Do KB or Mozaic Plugin Workshop have ads?
Neither KB nor Mozaic Plugin Workshop shows ads.
Which is updated more often, KB or Mozaic Plugin Workshop?
KB ships an update every 4 months, and Mozaic Plugin Workshop every 3 months. Most recently, KB was updated on September 17, 2026 and Mozaic Plugin Workshop on September 19, 2026.
Which is more popular, KB or Mozaic Plugin Workshop?
KB currently peaks at #199 in the App Store charts, and Mozaic Plugin Workshop at #182. Chart position reflects recent download velocity rather than total install base.

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